'Slaves of Sin' in the Bible

We know that our old self [our human nature without the Holy Spirit] was nailed to the cross with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin.

But thank God that though you were slaves of sin, you became obedient with all your heart to the standard of teaching in which you were instructed and to which you were committed.

When you were slaves of sin, you were free in regard to righteousness [you had no desire to conform to God’s will].